diff --git a/THIRD_PARTY_LICENSE.txt b/THIRD_PARTY_LICENSE.txt
index 364d64f9b8..61d5122dbe 100644
--- a/THIRD_PARTY_LICENSE.txt
+++ b/THIRD_PARTY_LICENSE.txt
@@ -343,7 +343,7 @@ The command line interpreter is covered by the Apache Software
 License. See the org/apache/LICENSE file for details.
 ================================================================================
 
-xz 5.2.6
+xz 5.8.3
 
 https://git.tukaani.org/?p=xz.git;a=blob;f=COPYING
 1
diff --git a/graalpython/com.oracle.graal.python.test.integration/src/com/oracle/graal/python/test/integration/module/LzmaTests.java b/graalpython/com.oracle.graal.python.test.integration/src/com/oracle/graal/python/test/integration/module/LzmaTests.java
index 0cb48b5c6e..fc28d5e072 100644
--- a/graalpython/com.oracle.graal.python.test.integration/src/com/oracle/graal/python/test/integration/module/LzmaTests.java
+++ b/graalpython/com.oracle.graal.python.test.integration/src/com/oracle/graal/python/test/integration/module/LzmaTests.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2023, 2025, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2023, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * The Universal Permissive License (UPL), Version 1.0
diff --git a/graalpython/python-liblzma/CMakeLists.txt b/graalpython/python-liblzma/CMakeLists.txt
index 7c973fa42d..8139192945 100644
--- a/graalpython/python-liblzma/CMakeLists.txt
+++ b/graalpython/python-liblzma/CMakeLists.txt
@@ -135,8 +135,6 @@ target_sources(${TARGET_LZMA} PRIVATE
     "${SRC_DIR}/liblzma/common/index_hash.c"
     "${SRC_DIR}/liblzma/common/stream_decoder.c"
     "${SRC_DIR}/liblzma/common/vli_decoder.c"
-    "${SRC_DIR}/liblzma/check/crc64_table.c"
-    "${SRC_DIR}/liblzma/check/crc32_table.c"
     "${SRC_DIR}/liblzma/check/crc64_fast.c"
     "${SRC_DIR}/liblzma/check/crc32_fast.c"
     "${SRC_DIR}/liblzma/check/check.c"
diff --git a/graalpython/python-liblzma/config.h b/graalpython/python-liblzma/config.h
index 54097d5cb9..17890db5d2 100644
--- a/graalpython/python-liblzma/config.h
+++ b/graalpython/python-liblzma/config.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, 2023, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2022, 2026, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * The Universal Permissive License (UPL), Version 1.0
@@ -113,7 +113,7 @@
 #else
 #define TUKLIB_PHYSMEM_SYSCONF 1
 #endif
-#define VERSION "5.2.6"
+#define VERSION "5.8.3"
 #ifndef _DARWIN_USE_64_BIT_INODE
 # define _DARWIN_USE_64_BIT_INODE 1
 #endif
diff --git a/mx.graalpython/suite.py b/mx.graalpython/suite.py
index c4a8220117..9b43143280 100644
--- a/mx.graalpython/suite.py
+++ b/mx.graalpython/suite.py
@@ -102,12 +102,12 @@
             ],
             "digest": "sha512:16920fd41f398696c563417049472c0d81abb2d293ecb45bbbe97c12651669833e34eac238e2e4a6f8761ea58fb39806425d2741e88e8c3097fe2b5457ebf488",
         },
-        "XZ-5.6.2": {
+        "XZ-5.8.3": {
             "urls": [
-                "https://lafo.ssw.uni-linz.ac.at/pub/graal-external-deps/xz-5.6.2.tar.gz",
+                "https://lafo.ssw.uni-linz.ac.at/pub/graal-external-deps/xz-5.8.3.tar.gz",
             ],
             "packedResource": True,
-            "digest": "sha512:c32c32c95e3541b906e0284e66a953ace677e0ce6af2084e7b122600047bf7542c1b0fabb5909b19ff79fba6def530be674df1c675b22a47a8d57f3f0b736a82",
+            "digest": "sha512:bd77164795b5cbfbe864f64021e67e37f39cb9aba9abdd894d53fbb6857abe074923808918d1dc3bb0706253e726b2b9704cd0c3bc744d70e220c7356fa4995e",
         },
         "BOUNCYCASTLE-PROVIDER": {
             "digest": "sha512:fb10c3c089921c8173ad285329f730e0e78de175d1b50b9bdd79c6a85a265af9b3331caa0c1ed57e5f47047319ce3b0f3bb5def0a3db9cccf2755cc95e145e52",
@@ -596,10 +596,10 @@
                 "bin/<lib:lzmasupport>",
             ],
             "cmakeConfig": {
-                "XZ_SRC": "<path:XZ-5.6.2>",
+                "XZ_SRC": "<path:XZ-5.8.3>",
                 "XZ_VERSION_MAJOR": "5",
-                "XZ_VERSION_MINOR": "6",
-                "XZ_VERSION_PATCH": "2",
+                "XZ_VERSION_MINOR": "8",
+                "XZ_VERSION_PATCH": "3",
             },
             "os_arch": {
                 "windows": {
@@ -621,7 +621,7 @@
                 },
             },
             "buildDependencies": [
-                "XZ-5.6.2",
+                "XZ-5.8.3",
             ],
         },